 | | Re: Battery Charging Question
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Hi, Yes, I read that too. But the pack was NiCd, mine is NiMH. According to some people, the charging methods between the two are different. I don't think I can charge NiMH pack like a NiCd pack (or can I??). -- Ray Aaron Dwyer (...) (24 years ago, 30-Mar-00, to lugnet.robotics.handyboard)
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| | RE: Battery Charging Question
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Ray This is a post that Dennis Clark answered thoroughly for me just last week. By the way thanks for that Dennis, I think I forgot to before. (...) You will need some good equipment, or you will need lots of patience and a good DVM. Here are the (...) (24 years ago, 30-Mar-00, to lugnet.robotics.handyboard)
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| | Battery Charging Question
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Hi all, I was wondering if any battery expert can help me on this. A friend of mine gave me a NiMH battery pack for my HB expansion board AUX power supply. It is rated 6V, 3 AH (yeah, he gave me the spec.) but there is no charger. I know charging (...) (24 years ago, 30-Mar-00, to lugnet.robotics.handyboard)
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| | Re: Ic 2.8 system requirements?
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(...) Try this page. Surprisingly, it's on the Handy Board web site! I used to run this software on a Mac IIfx. Gary Livick Tiny HC11 products for your robot (URL) (24 years ago, 29-Mar-00, to lugnet.robotics.handyboard)
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| | Re: Ic 2.8 system requirements?
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gads -- i think you can go with a 68030 mac and system 6.0.8. fred In your message you said: (...) stem (...) (24 years ago, 29-Mar-00, to lugnet.robotics.handyboard)
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| | Ic 2.8 system requirements?
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Hi Im currently using IC 2.8 and was wondering what its minimum system requirements are?(ram, speed,processor,system etc.) By the way Im a mac user so Is there acopy out there for a 68k mac? Thanx in advance and for quick responses? -Alex Ps- (...) (24 years ago, 29-Mar-00, to lugnet.robotics.handyboard)
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| | Using IC2/3 inputs w/interrupts in ASM?
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One of my students wants to use the IC2/3 lines for a function on his LEGO robot. He needs to write an ISR for this particular line. I've done this many times with the 6811 under the BUFFALO monitor, but I don't know the "side effects" likely if we (...) (24 years ago, 28-Mar-00, to lugnet.robotics.handyboard)
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| | How to hack the sonar module from a Polaroid 3500 Camera
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Anyone know how to hack the sonar module out of a Polaroid Sonar 3500 camera? Or got any good links? Thanks, Bill Denzel (24 years ago, 28-Mar-00, to lugnet.robotics.handyboard)
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| | Re: InterActive C 3.2 or Interactive C 2.8 freeware
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Oups, I thought this message was lost - Sorry about this (24 years ago, 27-Mar-00, to lugnet.robotics.handyboard)
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| | Rebuilding Pcoder
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Hi, has anybody ever manage to rebuild a pcoder, using Kent Farnsworth's routines? I just tried, but I am usure about the compiler switches. Next to the startbutton I found the remark "rev. 1.2A", Kent just mentioned REV2 or REV 2.1 board. (...) (24 years ago, 27-Mar-00, to lugnet.robotics.handyboard)
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| | Re: InterActive C 3.2 or Interactive C 2.8 freeware
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(...) Just try printf("\n %f",4.1/4.1); and see the surprising result with the free version (2.). You should be really careful, when using floating point operations, 'cause there seem to be loads of these errors. I am not sure, if this problem is (...) (24 years ago, 27-Mar-00, to lugnet.robotics.handyboard)
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| | Re: InterActive C 3.2 or Interactive C 2.8 freeware
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(...) Actually I am using the free version, but you have to be very careful, if you need reliable floating point operations. For example try printf("\n%f",4.1/4.1); and have a look at the surprising result (2.). This is just an example, there loads (...) (24 years ago, 27-Mar-00, to lugnet.robotics.handyboard)
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| | Re: A few questions.
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Hi Todd, I'll answer the best I can. (...) As long as the relay doesn't require more current than the motor driver chip can handle. You can always bridge the motor outputs together for higher current. The motor chip has the built in diode, so you (...) (24 years ago, 27-Mar-00, to lugnet.robotics.handyboard)
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| | (canceled)
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| | Re: A few questions.
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(...) I don't know about the other questions, but with Interactive C if you write a function called main it will be executed on power up. This just uses the reset interrupt, which can be set manually if you're using a different compiler/assembler; (...) (24 years ago, 27-Mar-00, to lugnet.robotics.handyboard)
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| | A few questions.
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Can the motor outputs be used to close a relay instead of running a motor? As an example to control a motor that needs 120v AC? As far as the inputs go, are the digital inputs for switch type sensors (high or low value only), and the analog inputs (...) (24 years ago, 27-Mar-00, to lugnet.robotics.handyboard)
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| | Re: Sonar
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The hardware is limited to 31.5' (~ 10 meters). The limitation is on the design of the receive amplifier's gain module (and noise floor). Generally scaling this to an integer of 32767 results in a precision of just over 1 tenth of an inch (or 1/3 (...) (24 years ago, 26-Mar-00, to lugnet.robotics.handyboard)
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| | Re: Sonar
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(...) Martin, I noticed a similar result as well. Maybe someone else can say for sure, but I seem to remember that there may be a way to slow down your interrupt counter, so that it won't overflow (a timer setup register). I don't have my 'HC11 book (...) (24 years ago, 26-Mar-00, to lugnet.robotics.handyboard)
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| | Re: sonar mapping with evidence grid
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(...) Yep, about 30 degrees. There's a pretty good article about how to deal with it on the Seattle Robotics Society web site: (URL) it out before somebody decides to delete it! One thing they don't really discuss in the article is how much extra (...) (24 years ago, 26-Mar-00, to lugnet.robotics.handyboard)
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| | Re: Sonar
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(...) That sounds correct. Someone else asked about that last year. Try searching the mailing list archives. The problem is not just that the result is an integer, but that it's a signed integer. You effectively only get 15 bits of information out (...) (24 years ago, 26-Mar-00, to lugnet.robotics.handyboard)
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